--- Urlader/urlib.c	2012/01/02 09:23:04	1.2
+++ Urlader/urlib.c	2012/01/06 07:56:36	1.3
@@ -112,15 +112,18 @@
 {
   void *addr;
 
-#ifdef _WIN32
-  HANDLE handle = CreateFileMapping (0, 0, PAGE_READWRITE, 0, size, NULL);
-
-  if (!handle)
+  if (!size)
     return 0;
 
-  addr = MapViewOfFile (handle, FILE_MAP_WRITE, 0, 0, size);
+#ifdef _WIN32
+  HANDLE handle = CreateFileMapping (0, 0, PAGE_READWRITE, 0, size, NULL);
 
-  CloseHandle (handle);
+  addr = 0;
+  if (handle)
+    {
+      addr = MapViewOfFile (handle, FILE_MAP_WRITE, 0, 0, size);
+      CloseHandle (handle);
+    }
 #elif defined (MAP_ANONYMOUS)
   addr = mmap (0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
 
@@ -130,12 +133,18 @@
   addr = malloc (size);
 #endif
 
+  if (!addr)
+    u_fatal ("memory allocation failure, aborting.");
+
   return addr;
 }
 
 static void
 u_free (void *addr, unsigned int size)
 {
+  if (!addr)
+    return;
+
 #ifdef _WIN32
   UnmapViewOfFile (addr);
 #elif defined (MAP_ANONYMOUS)
@@ -146,6 +155,16 @@
 }
 
 static void *
+u_realloc (void *addr, unsigned int old_size, unsigned int new_size)
+{
+  void *addr2 = u_malloc (new_size);
+  memcpy (addr2, addr, (new_size < old_size ? new_size : old_size));
+  u_free (addr, old_size);
+
+  return addr2;
+}
+
+static void *
 u_mmap (u_handle h, unsigned int size)
 {
   void *addr;
@@ -180,6 +199,35 @@
 }
 
 /////////////////////////////////////////////////////////////////////////////
+
+typedef struct
+{
+  char *addr;
+  unsigned int used;
+  unsigned int size;
+} u_dynbuf;
+
+static void *
+u_dynbuf_append (u_dynbuf *dynbuf, void *data, unsigned int len)
+{
+  char *dest;
+
+  if ((dynbuf->used += len) > dynbuf->size)
+    {
+      unsigned int new_size = dynbuf->size ? dynbuf->size * 2 : 4096;
+      dynbuf->addr = u_realloc (dynbuf->addr, dynbuf->size, new_size);
+      dynbuf->size = new_size;
+    }
+
+  dest = dynbuf->addr + dynbuf->used - len;
+
+  if (data)
+    memcpy (dest, data, len);
+
+  return dest;
+}
+
+/////////////////////////////////////////////////////////////////////////////
 
 static void
 u_set_datadir (void)